<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        p{
            letter-spacing: 1px; /*字母间距*/
            word-spacing: 1px;  /*单词间距*/
            writing-mode: vertical-lr;/*垂直排版 从左到右*/
        }
    </style>
</head>

<body>
    <p>learn css</p>
</body>
</html>